Gas-burner.



PATENTED AUG. 6, 1907.

R. THOMPSON. GAS BURNER. APPLIOATION FILED 00T.11, 1906.

wf/ Af @lfm/meow@ ROBERT THOMPSON, OF ROCHESTER, NEW YORK.

GAS-BURNER.

Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed GtOber 11, 1906. Serial No. 338,479.

To all whom it may concern:

Be it known that I, ROBERT THOMPSON, a subject of the King of England,residing at Rochester, in the county of Monroe and State of New York,have invented certain new and useful Improvements in Gas-Burners; and Ido declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the saine.

My invention is an improved gas burner, and it consists in theconstruction, combination and arrangement of devic'es hereinafterdescribed and claimed. i

The object of my invention is to provide an improved gas burner, whichwill only operate to permit the discharge and the burning of the gaswhile the burner is heated to some extent, and which, in the event thatthe jet should become extinguished without the gas having been first cutoff, will, as its temperature lowers, automatically cut off the escapeof gas, and hence secure the occupant or occupants of the room againstthe danger of asphyxiation.

In the accompanying drawii1gs,-Figure l is a sectional view of myimproved burner, showing the same in operation; Fig. 2 is a similarview, showingthe burner closed against the escape of gas. The drawingsare on an exaggerated scaleHin order to clearly show the details ofconstruction of my improved burner.

In the construction of my burner, I provide a body l, which may becylindrical, or of any other suitable shape, and has a longitudinalpassage 2 in one side for the gas, and means at the lower end of saidpassage, as at 3, to enable the burner to be attached to a gas fixture.In the upper end of the body is a chamber 4, and the same is providedalso with a cap 5, which carries a gas tip G. The lower end of the saidtip projects below the cap 5, is disposed directly above, and is spacedsomewhat from the upper end of the gas passage 2A The body is alsoprovided with a cylindrical bore 7, parallel with the gas passage 2, andwhich forms a chamber for the reception of a column of mercury,indicated at S. The lower end of the mercury chamber is closed by ascrew-plug 9, which also acts as an adjuster for the mercury column. Inthe upper end Yof the mercury chamber or cylinder, is a plunger l0,which will rise and fall as the mercury expands 'and contracts undervarying temperatures. A yoke link ll is disposed in the chamber 4,pivoted at l2, provided at one end with a valve 13 to coact with thelower end of the gas tip, and its opposite end is provided with adepending portion 14, which bears on the plunger lO. The valve 13 ishere shown as a disk, which may be made of rubber or of any othersuitable material. A spring l5 acts to normally close the valve againstthe lower end of the gas tip to prevent the escape of gas from the tip.The said spring is here shown as a coiled, extensible spring having itslower portion in the gas passage 2 and supported by a pin I6. A trip pin17, which is disposed near the burner tip and passes through and isguided in an opening in the cap 5, has its lower end loosely connectedto the yoke link ll. At the upper end of the said trip pin is a headI8.v A spring 19 is here shown on the trip pin to coact with the rspringl5 in normally closing the valve 13, but the use of the said spring l9is optional.

The operation of my invention is as follows: In order to light the gas,the trip pin must be first depressed to open the valve I3 and this maybe done by bearing down on the said trip pin with the match which isused for igniting the gas. The body of the burner and the mercury columntherein become heated to some extent by radiation from the gas jet, andthe column oi mercury rises and acts on the plunger l() and yoke link llto keep the valve I3 open, against the tension of the springs l5, I9. Inthe event that the gas should become extinguished without having beenturned off by the usual gas-cock or valve, the burner will becomecooled, and as the mercury columns lowers, the spring l5 will actagainst the valve 13 to close the latter against the lower end oi' thegas tip and hence cut off the escape of gas from the burner and avoiddanger to persons in th room.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention, as defined by theappended claims.

Having thus described my invention, what I claim as new, and desire tosecure by Letters-Patent, is,-

The hereindescribed gas burner comprising a body having a gas passage, achamber communicating therewith, and :i bore containing a mercurycolumn, an adjusting plugat the bottom of said column, a plunger at theupper end of said column, a tip secured in the top of the chamber andhaving its inner end projecting into said chamber, a yoke link mountedin the chamber, operated by the plunger and having a valve, and a springto move the yoke link in one direction and vnormally close its valveagainst the lower end of the tip.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

ROBERT THOMPSON.

Witnesses LINCOLN L. WEST, HENRY E. LEONARD.

